Intelligent pressure reducing valve with stepless pressure regulation function

Abstract

The utility model belongs to the technical field of valves, and particularly discloses a stepless pressure regulating intelligent pressure reducing valve which comprises a main valve, and the main valve comprises a valve body internally provided with a first sensing cavity; a main valve clack is arranged in the valve body, a first induction cavity is formed between the main valve clack and the first induction cavity, the valve body is provided with a bypass channel, a pilot valve is installed on the bypass channel, the pilot valve is used for adjusting the opening degree of the bypass channel so as to change the pressure of the first induction cavity, and the pilot valve is further connected with an electric execution device; the pressure reducing valve further comprises a control module and a pressure sensor, the control module is electrically connected with the pressure sensor and the electric execution device, the pressure sensor is used for detecting the outlet pressure of the valve body, and the control module is used for comparing and calculating the pre-input target outlet pressure with the actual outlet pressure detected by the pressure sensor. And controlling the electric execution device to adjust the valve opening pressure of the pilot valve according to the calculation result. According to the pressure reducing valve, closed-loop intelligent control can be conducted, and stepless automatic adjustment of downstream pressure is achieved.

Description

Technical Field

[0001] This application belongs to the technical field of valves, and more specifically, relates to an intelligent pressure reducing valve with stepless pressure regulation. Background Art

[0002] A pressure reducing valve is a valve that reduces the inlet pressure to a required outlet pressure through a pressure regulating unit and relies on the energy of the medium itself to automatically maintain the stability of the outlet pressure. Pressure reducing valves are widely used in high-rise buildings, areas with excessive water supply network water pressure in cities, mines, and other occasions to ensure that each water usage point in the water supply system obtains appropriate service water pressure and flow rate.

[0003] Currently, in traditional mechanical pressure reducing valves, the opening of the pressure relief port is mostly adjusted through the interaction between the spring and the valve core in the pressure regulating unit, and then the pressure of the medium is adjusted. The pre-tightening force of the spring determines the set value of the pressure behind the valve.

[0004] However, under this working mechanism, the pressure reducing valve can only be set to a certain pressure behind the valve. When the pressure behind the valve needs to change, it is often necessary to manually disassemble and adjust the pressure reducing valve; the reaction speed of manual pressure regulation is usually slow, and it cannot quickly respond to instantaneous pressure changes, and the accuracy of manual pressure regulation is often difficult to guarantee, so it urgently needs to be improved. Summary of the Utility Model

[0005] In view of the defects or improvement requirements of the prior art, this application provides an intelligent pressure reducing valve with stepless pressure regulation, aiming to improve the problems of slow reaction speed and difficult accuracy guarantee of manual pressure regulation existing in traditional pressure reducing valves.

[0006] An intelligent pressure reducing valve with stepless pressure regulation provided by this application specifically includes a main valve. The main valve includes a valve body with a first induction cavity built-in; a main valve flap that is movably and hermetically connected to the first induction cavity is arranged in the valve body. A first induction cavity is formed between one end of the main valve flap and the first induction cavity. The main valve flap can reciprocate with the change of the pressure difference between the inlet of the valve body and the first induction cavity to adjust the inlet opening.

[0007] The valve body has a bypass channel that connects the first induction cavity and the outlet of the valve body. A pilot valve is installed on the bypass channel. The pilot valve is used to adjust the opening of the bypass channel to change the pressure of the first induction cavity, and the pilot valve is also connected to an electric actuator.

[0008] The pressure reducing valve further includes a control module and a pressure sensor. The control module is electrically connected to the pressure sensor and the electric actuator respectively. The pressure sensor is used to detect the outlet pressure of the valve body. The control module is used to compare and calculate the pre-input target outlet pressure with the actual outlet pressure detected by the pressure sensor, and control the electric actuator to adjust the opening pressure of the pilot valve according to the calculation result.

[0009] Through the above technical solution conceived by the present application, compared with the prior art, this pressure reducing valve can automatically control the electric actuator through the control module, quickly and accurately adjust the pressure at the valve orifice of the pressure reducing valve, and improve the problems of slow reaction speed of manual pressure regulation and difficult guarantee of manual pressure regulation accuracy existing in the traditional pressure reducing valve.

[0010] Specifically, when it is necessary to adjust the pressure behind the valve, the set value of the target outlet pressure in the control module is adjusted according to the requirement. The control module obtains the current outlet pressure of the valve body (i.e., the pressure value behind the valve) through the pressure sensor. The control module compares the pressure value behind the valve with the set value (i.e., the pre-entered target outlet pressure value) in real time, and controls the electric actuator to adjust the opening pressure of the pilot valve according to the calculation result, thereby realizing the adjustment of the pressure behind the valve. When the pressure value behind the valve reaches within the allowable deviation range of the set value, the control module controls the electric actuator to stop running, and the pressure reducing valve operates normally under the drive of the medium, so that the outlet pressure of the pressure reducing valve is maintained at this set value.

[0011] As a further preference, the pilot valve includes a pilot valve body and a valve core assembly, wherein:

[0012] The pilot valve body is connected to the bypass channel by being accessed beside the outer side of the valve body, and the circumferential surface of the pilot valve body is hermetically attached to the inner wall of the bypass channel. An inner flow channel is provided in the pilot valve body, and the inner flow channel communicates with the first induction cavity and the outlet of the valve body.

[0013] The valve core assembly is arranged in the pilot valve body and is used to adjust the opening degree of the inner flow channel.

[0014] As a further preference, an installation platform is formed by protruding circumferentially at the outer end of the pilot valve body. The fixed end of the electric actuator is connected to the installation platform, and the output end of the electric actuator is connected to the valve core assembly.

[0015] As a further preference, the electric actuator is detachably connected to the installation platform.

[0016] As a further preference, the valve core assembly includes a pilot valve flap, and the outer end of the pilot valve flap is located at the medium outlet of the inner flow channel.

[0017] As a further preference, the valve core assembly further includes an adjusting rod, an adjustable spring and a diaphragm. The adjusting rod, the adjustable spring, the diaphragm and the pilot valve flap are connected in sequence from one end of the pilot valve body located outside the valve body to the end located inside the valve body, wherein:

[0018] The adjusting rod is connected to the output end of the electric actuator;

[0019] One side of the diaphragm is provided with an adjusting cavity, and the other side of the diaphragm is provided with a second induction cavity. The second induction cavity communicates with the outlet of the valve body through a through hole.

[0020] As a further preference, an elastic member is connected between the main valve flap and the first induction cavity.

[0021] As a further preference, the main valve flap is provided with an induction channel, and the first induction cavity is communicated with the inlet of the valve body through the induction channel.

[0022] As a further preference, a valve seat for forming a sealing pair with the main valve flap is arranged at the inlet of the valve body. The valve seat is hermetically connected to the inner wall of the valve body in the circumferential direction, and the main valve flap is restricted in the valve body by the valve seat.

[0023] As a further preference, a guiding element is arranged at the valve seat opening of the valve seat. A guide rod is arranged at one end of the main valve flap facing the valve opening, and the guide rod is in sliding fit with the guiding element.

[0024] Generally speaking, compared with the prior art by the above technical solution conceived by this application, the following technical advantages are mainly possessed:

[0025] 1. When it is necessary to adjust the outlet pressure of the pressure reducing valve, input the target outlet pressure (i.e., input the set value) in the control module. The control module can compare and calculate according to the target outlet pressure and the actual outlet pressure detected by the pressure sensor, and automatically control the electric actuator to adjust the opening pressure of the pilot valve according to the calculation result, so that the outlet pressure value of the pressure reducing valve reaches within the allowable deviation range of the set value.

[0026] 2. The arranged electric actuator can drive the adjusting rod to perform linear displacement, and the displaced adjusting rod adjusts the tension degree of the adjustable spring, and further adjusts the elastic force applied by the adjustable spring on the diaphragm, so that the diaphragm can deform and adjust with the change of the force difference between the elastic force of the adjustable spring and the medium pressure of the second induction cavity, and further drive the pilot valve flap to reciprocate to adjust the opening degree of the inner flow passage, realizing the opening degree adjustment of the pilot valve. Description of the Drawings

[0027] Figure 1 is a cross-sectional view of the intelligent pressure reducing valve provided by the embodiment of this application;

[0028] Figure 2 is a cross-sectional view of the valve body provided by the embodiment of this application;

[0029] Figure 3 is a partial cross-sectional view of the intelligent pressure reducing valve provided by the embodiment of this application;

[0030] Figure 4 is a cross-sectional view of the valve body and the main valve flap provided by the embodiment of this application.

[0031] In all the drawings, the same reference numerals are used to represent the same elements or structures, where:

[0032] 1. Valve body; 1-1. First induction cavity; 1-2. Bypass channel; 1-3. Water outlet cavity; 2. Main valve flap; 2-1. Induction channel; 3. Pressure regulating device; 3-1. Pilot valve body; 3-2. Installation platform; 3-3. Pilot valve flap; 3-4. Adjusting rod; 3-5. Adjustable spring; 3-6. Diaphragm; 3-7. Inner cylinder; 3-8. Pressure regulating cavity; 4. Pressure sensor; 5. Electric actuator; 6. Elastic member; 7. Valve seat; 7-1. Guide element; 8. Guide rod; 10. First induction cavity; 20. Inlet; 30. Outlet; 40. Adjusting cavity; 50. Second induction cavity; 60. Through hole. Detailed implementation manner

[0033] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] The following combines the attached Figures 1-4 The present application is further described in detail.

[0035] The embodiment of the present application discloses an intelligent pressure reducing valve with stepless pressure regulation. Referring to Figure 1 , the intelligent pressure reducing valve with stepless pressure regulation includes a main valve. The main valve includes a valve body 1 with a first induction cavity 1-1 built therein; a main valve flap 2 is arranged in the valve body 1 and is movably and sealingly connected to the first induction cavity 1-1. A first induction cavity 10 is formed between one end of the main valve flap 2 and the first induction cavity 1-1. The main valve flap 2 can reciprocate with the change of the pressure difference between the inlet 20 of the valve body 1 and the first induction cavity 10 to adjust the opening degree of the inlet 20; the valve body 1 has a bypass channel 1-2, and the bypass channel 1-2 communicates the first induction cavity 10 and the outlet 30 of the valve body 1. A pilot valve is installed on the bypass channel 1-2. The pilot valve is used to adjust the opening degree of the bypass channel 1-2 to change the pressure of the first induction cavity 10, and the pilot valve is also connected to an electric actuator 5; in addition, the pressure reducing valve further includes a control module and a pressure sensor 4. The control module is electrically connected to the pressure sensor 4 and the electric actuator 5 respectively. The pressure sensor 4 is used to detect the outlet pressure of the valve body 1. The control module is used to compare and calculate according to the pre-input target outlet pressure and the actual outlet pressure detected by the pressure sensor 4, and control the electric actuator 5 to adjust the opening pressure of the pilot valve according to the calculation result.

[0036] In addition, the electric actuator 5 in the intelligent pressure reducing valve can adopt a stepless speed regulation electric push rod, or any other feasible electric device with a stepless linear displacement adjustment function. Generally speaking, an electric device with a manual operation function should be selected.

[0037] For example, in this intelligent pressure reducing valve, such asFigure 2 A cross-sectional view from another perspective as shown. A clearance flow passage is also formed between the outer surface of the first induction cavity 1-1 and the inner wall of the valve body 1. An outlet cavity 1-3 with an outlet 30 is formed at the rear end of the valve body 1, and the outlet cavity 1-3 is communicated with the front end of the valve body 1 through the clearance flow passage.

[0038] As Figure 1 、 Figure 3 、 Figure 4 shown, the pilot valve includes a pilot valve body 3-1 and a spool assembly. The pilot valve body 3-1 is connected to the bypass passage 1-2 by being connected beside the outside of the valve body 1, and the circumferential surface of the pilot valve body 3-1 is in sealing fit with the inner wall of the bypass passage 1-2. An internal flow passage is provided in the pilot valve body 3-1, and the internal flow passage is communicated with the first induction cavity 10 and the outlet 30 of the valve body 1 through the bypass passage 1-2, so that a medium flow path as shown by path 1 in Figure 3 can be formed between the pilot valve body 3-1 and the main valve body 1; and the spool assembly is arranged in the pilot valve body 3-1 to adjust the opening degree of the internal flow passage (i.e., adjust the opening degree of path 1).

[0039] Furthermore, the spool assembly includes a pilot valve flap 3-3. The outer end of the pilot valve flap 3-3 is located at the medium outlet of the internal flow passage, and the maximum diameter of the outer end of the pilot valve flap 3-3 is not less than the caliber of the medium outlet. The pilot valve flap 3-3 can reciprocate in the internal flow passage to adjust the opening degree of the medium outlet of the internal flow passage.

[0040] Furthermore, there are various adjustment methods for the pilot valve flap 3-3. In some embodiments, the pilot valve flap 3-3 can be directly driven by an electric actuator 5 to move, so as to realize the adjustment of the opening degree of the medium outlet. For example: the driving end of the electric actuator 5 is connected to the pilot valve flap 3-3.

[0041] In other embodiments, the spool assembly further includes an adjusting rod 3-4, an adjustable spring 3-5 and a diaphragm 3-6. The adjusting rod 3-4, the adjustable spring 3-5, the diaphragm 3-6 and the pilot valve flap 3-3 are connected in sequence from the end of the pilot valve body 3-1 located outside the valve body 1 to the end located inside the valve body 1.

[0042] Among them, the adjusting rod 3-4 is connected to the output end of the electric actuator 5; the diaphragm 3-6 is elastic, the outer peripheral edge of the diaphragm 3-6 is connected to the pilot valve body 3-1, the pilot valve body 3-1 forms an adjusting cavity 40 on one side of the diaphragm 3-6, and forms a second induction cavity 50 on the other side of the diaphragm 3-6. The second induction cavity 50 is communicated with the outlet 30 of the valve body 1 through a through hole 60, and a medium flow path as shown by path 2 in Figure 3 can be formed in the second induction cavity 50, so that the medium behind the valve can exert pressure on the diaphragm 3-6 in the second induction cavity 50.

[0043] Under this design, the driving end of the electric actuator 5 drives the adjusting rod 3-4 to perform linear displacement, adjusts the tension of the adjustable spring 3-5, and further adjusts the elastic force exerted by the adjustable spring 3-5 on the diaphragm 3-6, so that the diaphragm 3-6 can be deformed and adjusted with the change of the force difference between the elastic force of the adjustable spring 3-5 and the medium pressure in the second induction chamber 50, and then drives the pilot valve flap 3-3 to reciprocate to adjust the opening degree of the inner flow path.

[0044] It should be noted that in some embodiments, one end of the pilot valve body 3-1 extending into the main valve body 1 presents a concentric inner and outer double-cylinder structure, and this inner and outer double-cylinder structure includes an inner cylinder 3-7 and an outer cylinder 3-8. Among them, the inner cavity of the inner cylinder 3-7 is communicated to the outside of the outer cylinder 3-8 through a communication pipe or a communication hole or other feasible communication structures; and the pilot valve flap 3-3 is movably arranged in the inner cylinder 3-7, and the peripheral wall of the end of the pilot valve flap 3-3 is slidably sealed with the inner peripheral wall of the inner cylinder 3-7. The middle part of the pilot valve flap 3-3 is concave and forms a gap with the inner cylinder 3-7. The outer end of the pilot valve flap 3-3 is used to adjust the opening degree of the outer end of the inner cylinder 3-7 to realize the formation of path one. And a path two is formed between the inner peripheral surface of the outer cylinder 3-8 and the outer peripheral surface of the inner cylinder 3-7. The outer end of path two is always open, and the inner end of path two is communicated with the second induction chamber 50. Path two is the above-mentioned through hole 60.

[0045] Further, as Figure 1 、 Figure 3 shown, to realize the stable installation of the electric actuator 5, an installation platform 3-2 is formed by protruding the outer end of the pilot valve body 3-1 in the circumferential direction. The fixed end of the electric actuator 5 is connected to the installation platform 3-2, and the output end of the electric actuator 5 is connected to the valve core assembly. For the convenience of maintenance, the electric actuator 5 is detachably connected to the installation platform 3-2; for example, a bolt is used for detachable connection.

[0046] Further, as Figure 1 shown, a valve seat 7 with a valve seat opening is arranged at the inlet 20 of the valve body 1. The valve seat 7 is circumferentially sealed and connected to the inner wall of the valve body 1 through a sealing ring, and the inner diameter of the valve seat 7 is smaller than the outer diameter of the main valve flap 2. Under this design, the valve seat 7 can form a sealing pair with the main valve flap 2 and can limit the main valve flap 2 within the valve body 1.

[0047] Further, an elastic member 6 is connected between the main valve flap 2 and the first induction cavity 1-1. The elastic member 6 includes but is not limited to a spring. The elastic member 6 can exert an elastic force on the main valve flap 2 towards the valve seat opening (i.e., the inlet 20). To improve the stability of the main valve flap 2, a guiding element 7-1 is arranged at the valve seat opening of the valve seat 7, and a guide rod 8 is arranged at one end of the main valve flap 2 facing the valve seat opening. The guide rod 8 is slidably matched with the guiding element 7-1.

[0048] Under this design, through the slidable connection between the guide rod 8 and the valve seat 7, and the slidable and sealed connection between the main valve flap 2 and the first induction cavity 1-1, a double guiding structure in the same direction is formed to limit the movement direction of the main valve flap 2, ensure the sealing performance of the main valve flap 2, and prevent the main valve flap 2 from having a position deviation during movement.

[0049] Furthermore, the main valve flap 2 is also provided with an induction channel 2-1, and the first induction cavity 10 is communicated with the inlet 20 of the valve body 1 through the induction channel 2-1. Preferably, the induction channel 2-1 extends axially from the inner end face of the main valve flap 2 and penetrates through the guide rod 8.

[0050] The implementation principle of an intelligent pressure reducing valve according to an embodiment of the present application is as follows:

[0051] When the pressure reducing valve is in the debugging stage, or when the pressure reducing valve is in online operation and needs to adjust the outlet pressure, the staff adjusts the target outlet pressure value entered in the control module. The control module obtains the current outlet pressure of the valve body 1 (i.e., the valve rear pressure value) through the pressure sensor 4, and then the control module uses the built-in control system logic algorithm. The control module compares the valve rear pressure value with the set value (i.e., the pre-input target outlet pressure value) in real time to form a closed-loop algorithm, and automatically controls the electric actuator 5 to adjust the elastic force of the adjustable spring 3-5. When the valve rear pressure value reaches within the allowable deviation range of the set value (this deviation range is preset in advance or adjusted and set in the control module), the control module controls the electric actuator 5 to stop operating, and the intelligent pressure reducing valve operates normally under the drive of the medium. When the electronic control system of the control module fails, it can be switched to manual operation to realize the manual adjustment of the valve rear pressure.

[0052] When the intelligent pressure reducing valve is in the current working state, the medium enters from the inlet 20 of the valve body 1 and pushes the main valve flap 2 to open the main valve flap 2, so that the medium enters the inner cavity of the valve body 1 and flows into the water outlet cavity 1-3 where the inner outlet 30 of the valve body 1 is located; at the same time, the medium flows from the inlet 20 through the induction channel 2-1 into the first induction cavity 10, and then along Figure 3 As shown in path 1 in the figure, it flows from the first induction cavity 10 through the bypass channel 1-2 into the inner flow path of the pilot valve, and flows out of the inner flow path through the medium outlet into the water outlet cavity 1-3; the medium in the water outlet cavity 1-3 flows out of the intelligent pressure reducing valve through the outlet 30 of the valve body 1 to achieve pressure reduction and water outlet.

[0053] When the inlet medium pressure of the pressure reducing valve increases, the pressures in the first sensing chamber 10 and the second sensing chamber 50 increase accordingly. The medium pressure on the lower side of the diaphragm 3-6 is greater than the elastic force exerted by the adjustable spring 3-5 on the upper side of the diaphragm 3-6. The diaphragm 3-6 moves upward and drives the pilot valve flap 3-3 to move upward, resulting in a decrease in the opening of the pilot valve. The decrease in the opening of the pilot valve causes a reduction in the medium flowing out of the first sensing chamber 10 through the pilot valve, and the pressure in the first sensing chamber 10 continues to increase. The pressure in the first sensing chamber 10 is greater than the medium pressure at the inlet 20 of the pressure reducing valve, causing the main valve flap 2 to move towards the inlet 20 of the valve body 1, reducing the inlet opening of the pressure reducing valve, and the medium pressure flowing through the pressure reducing valve decreases until the outlet pressure of the pressure reducing valve balances the pressure exerted by the adjustable spring 3-5 on the diaphragm 3-6, and the pressure in the first sensing chamber 10 balances the pressure at the inlet 20 of the pressure reducing valve. The pilot valve flap 3-3 and the main valve flap 2 stop moving, keeping the outlet pressure of the pressure reducing valve at the target outlet pressure.

[0054] When the inlet medium pressure of the pressure reducing valve decreases, the pressures in the first sensing chamber 10 and the second sensing chamber 50 decrease. The medium pressure on the lower side of the diaphragm 3-6 of the pilot valve is less than the elastic force exerted by the adjustable spring 3-5 on the upper side of the diaphragm 3-6, causing the diaphragm 3-6 to move downward and drive the pilot valve flap 3-3 to move downward, increasing the opening of the pilot valve. The increase in the opening of the pilot valve causes an increase in the medium flowing out of the first sensing chamber 10 through the pilot valve, and the pressure in the first sensing chamber 10 continues to decrease. The pressure in the first sensing chamber 10 is less than the medium pressure at the inlet 20 of the pressure reducing valve, causing the main valve flap 2 of the pressure reducing valve to move away from the inlet 20, increasing the inlet opening of the main valve, and the medium pressure flowing through the pressure reducing valve increases until the outlet pressure of the pressure reducing valve balances the elastic force exerted by the adjustable spring 3-5 on the diaphragm 3-6, and the pressure in the first sensing chamber 10 balances the pressure at the inlet 20 of the pressure reducing valve. The pilot valve flap 3-3 and the main valve flap 2 stop moving, keeping the outlet pressure of the pressure reducing valve at the target outlet pressure.

[0055] It should be understood that expressions such as "including" and "may include" used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit the existence of one or more additional functions, operations, and constituent elements. In this application, terms such as "including" and / or "having" can be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or a combination thereof, but cannot be interpreted as excluding the existence or possibility of addition of one or more other characteristics, numbers, operations, constituent elements, components, or a combination thereof.

[0056] It should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0057] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0058] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0059] Those skilled in the art can easily understand that the above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An intelligent pressure reducing valve with stepless voltage regulation, characterized in that, The main valve comprises a valve body (1) with a built-in first sensing cavity (1-1); a main valve flap (2) is provided in the valve body (1) and is movably and hermetically connected to the first sensing cavity (1-1); a first sensing cavity (10) is formed between one end of the main valve flap (2) and the first sensing cavity (1-1); the main valve flap (2) can reciprocate with the pressure difference between the inlet (20) of the valve body (1) and the first sensing cavity (10) to adjust the opening of the inlet (20); The valve body (1) has a bypass channel (1-2), the bypass channel (1-2) is connected to the first sensing chamber (10) and the outlet (30) of the valve body (1), a pilot valve is installed on the bypass channel (1-2), the pilot valve is used to adjust the opening of the bypass channel (1-2) to change the pressure of the first sensing chamber (10), and the pilot valve is also connected to the electric actuator (5); The pressure reducing valve further comprises a control module and a pressure sensor (4), wherein the control module is electrically connected to the pressure sensor (4) and the electric actuator (5), respectively; the pressure sensor (4) is used to detect the pressure of the outlet (30) of the valve body (1); the control module is used to compare and calculate the actual outlet (30) pressure detected by the pressure sensor (4) based on the pre-input target outlet (30) pressure, and to control the electric actuator (5) to adjust the valve opening pressure of the pilot valve based on the calculation result.

2. The intelligent pressure reducing valve with stepless voltage regulation according to claim 1, characterized in that, The pilot valve comprises a pilot valve body (3-1) and a valve core assembly, wherein: The pilot valve body (3-1) is connected to the bypass channel (1-2) from the outside of the valve body (1), and the circumferential surface of the pilot valve body (3-1) is sealed and fitted with the inner wall of the bypass channel (1-2). The pilot valve body (3-1) has an internal flow channel, which communicates with the first sensing chamber (10) and the outlet (30) of the valve body (1); The valve core assembly is arranged in the pilot valve body (3-1) and is used to adjust the opening of the inner flow channel.

3. The intelligent pressure reducing valve with stepless voltage regulation according to claim 2, characterized in that, The outer end of the pilot valve body (3-1) protrudes along the circumferential direction to form a mounting platform (3-2), the fixed end of the electric actuator (5) is connected to the mounting platform (3-2), and the output end of the electric actuator (5) is connected to the valve core assembly.

4. The intelligent pressure reducing valve with stepless voltage regulation according to claim 3, characterized in that, The electric actuator (5) is detachably connected to the mounting platform (3-2).

5. The intelligent pressure reducing valve with stepless voltage regulation according to claim 2, characterized in that, The valve core assembly comprises a pilot valve flap (3-3), the outer end of the pilot valve flap (3-3) being located at the medium outlet of the inner flow channel.

6. The intelligent pressure reducing valve with stepless voltage regulation according to claim 5, characterized in that The valve core assembly further comprises an adjusting rod (3-4), an adjustable spring (3-5) and a diaphragm (3-6), wherein the adjusting rod (3-4), the adjustable spring (3-5), the diaphragm (3-6) and the pilot valve disc (3-3) are connected in sequence from one end of the pilot valve body (3-1) located outside the valve body (1) to one end located inside the valve body (1), wherein: The regulating rod (3-4) is connected to the output end of the electric actuator (5); A regulating cavity (40) is provided on one side of the diaphragm (3-6), and a second sensing cavity (50) is provided on the other side of the diaphragm (3-6). The second sensing cavity (50) is connected to the outlet (30) through a through hole (60).

7. The intelligent pressure reducing valve with stepless voltage regulation according to any one of claims 1-6, characterized in that An elastic member (6) is connected between the main valve flap (2) and the first induction cavity (1-1).

8. The intelligent pressure reducing valve with stepless voltage regulation according to any one of claims 1-6, characterized in that The main valve flap (2) is provided with an induction channel (2-1), and the first induction cavity (10) is communicated with the inlet (20) of the valve body (1) through the induction channel (2-1).

9. The intelligent pressure reducing valve with stepless voltage regulation according to any one of claims 1-6, characterized in that, A valve seat (7) for forming a sealing pair with the main valve flap (2) is arranged at the inlet (20) of the valve body (1). The valve seat (7) is hermetically connected to the inner wall of the valve body (1) in the circumferential direction, and the main valve flap (2) is restricted within the valve body (1) by the valve seat (7).

10. The intelligent pressure reducing valve with stepless voltage regulation according to claim 9, characterized in that, A guiding element (7-1) is arranged at the valve seat opening of the valve seat (7). A guide rod (8) is arranged at one end of the main valve flap (2) facing the valve opening, and the guide rod (8) is in sliding fit with the guiding element (7-1).

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